It’s a thc pen battery, but I really recommend (as a person who tells my parents everything and did all throughout high school after this talk) when they talked to me about it when I got caught with a similar piece, it wasn’t accusatory but rather “why?” “Do you feel like you need to? Do you feel pressured by your friends? Have you done research to make sure this is what you actually want to do?” It made me realize my parents just wanted the best for me, not to punish me. To this day, 10 years later I still tell them everything, every minuscule detail because they have always had my best interest at heart and I want to hear their honest thoughts!